JUL 2020 Chapter 92 ENG Version Page 92.35
92-192 G457-2 Antenna Installation (TV Tuner; continued)
D. Scheduled Inspections
Every 100-hour or annual inspection, inspect CI 273 TV tuner antenna for proper
installation (refer to R66 Illustrated Parts Catalog Chapter 92) & proper operation per
Part C steps 6 and 7.
E. Special Inspections
1. Refer to Figure 92-1. Turn battery & news equipment switches off. Open circuit
breaker panel.
2. As required, remove CI 273 TV tuner antenna per Part A. Inspect condition of
and verify no obvious damage to antenna, circuit breaker, and wiring. Verify no
loose, chafed, or broken wires or terminals. Verify no evidence of arcing. Verify
equipment security.
3. Secure circuit breaker panel. Install antenna per Part A if removed.
92-193 G457-3 Antenna Installation (Scanner)
A. Schematic
Refer to Figure 92-11 for G489 scanner installation wiring diagram.
B. Removal
1. Refer to Figure 92-1. Turn battery & news equipment switches off and pull out
SCANNER (2 amp) circuit breaker at panel.
2. Remove G13000 audio system router per § 92-253.
3. Disconnect antenna cable from CI 285 antenna at connectors.
4. Supporting antenna and B322-14 plate, remove screws securing antenna and
plate to cabin skin and remove antenna and plate.
C. Installation
1. Refer to Figure 92-1. Turn battery & news equipment switches off and pull out
SCANNER (2 amp) circuit breaker at panel.
2. Remove paint & primer from between cabin skin and CI 285 antenna to ensure
electrical ground.
3. Supporting antenna and B322-14 plate, install screws securing antenna and plate
to cabin skin. Verify security.
4. Connect antenna cable to antenna at connectors.
5. Install G13000 audio system router per § 92-253.
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